Reduce Image File Size Macbook. You can reduce the size color correct and change resolution based on pixels per inch. To search for an image name or tag open finder then click the magnifying glass icon in the menu bar.
Step 1 navigate to the image you wish to resize. If you want to crop out a part of the image to resize see cropping an image in preview. Go to the file menu and highlight open.
Go to the file menu and highlight open.
Step 1 navigate to the image you wish to resize. Navigate to the photo you want to reduce and click open. Using preview tool you can resize multiple images on macbook os x. To search for an image name or tag open finder then click the magnifying glass icon in the menu bar.